A new Cluster publication resulted from a collaboration with the Max Planck Institute for Medical Research demonstrates how holographic sound fields enable rapid prototyping of matter in 3D. PI Peer Fischer is one of the authors who succeeded in the one-step assembly of matter using acoustic forces. In theirpaper published in Science Advancesthey combine multiple holographic sound fields to drive the contactless assembly of solid microparticles, hydrogel beads, and biological cells. Since conventional methods are slow and apply mechanical or chemical stress on biological cells, the results are especially promising for biofabrication.